org.netbeans.api.debugger.jpda.InvalidExpressionException: No current context
   at org.netbeans.modules.debugger.jpda.JPDADebuggerImpl.invokeMethod(JPDADebuggerImpl.java:1001)
   at org.netbeans.modules.debugger.jpda.JPDADebuggerImpl.invokeMethod(JPDADebuggerImpl.java:950)
   at org.netbeans.modules.debugger.jpda.models.AbstractObjectVariable.getToStringValue(AbstractObjectVariable.java:476)
   at org.netbeans.modules.debugger.jpda.models.AbstractObjectVariable.getToStringValue(AbstractObjectVariable.java:425)
Caused: java.lang.reflect.InvocationTargetException
   at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:0)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:601)
   at org.netbeans.modules.debugger.jpda.ui.models.VariablesNodeModel.getLimitedToString(VariablesNodeModel.java:342)
   at org.netbeans.modules.debugger.jpda.ui.models.VariablesNodeModel.getShortDescriptionSynch(VariablesNodeModel.java:284)
   at org.netbeans.modules.debugger.jpda.ui.models.WatchesNodeModelFilter.getShortDescriptionSynch(WatchesNodeModelFilter.java:139)
   at org.netbeans.modules.debugger.jpda.ui.models.VariablesNodeModel$1.run(VariablesNodeModel.java:264)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2048)